<template>
	<view>
		<view class="search-box">
			<uni-search-bar @input="input" :radius="100" cancel-button="none">
			</uni-search-bar>
		</view>
		<view class="sugg-list" v-if="searchResults.length !== 0">
			<view class="sugg-item" @click="gotoDetail(item)" v-for="(item,i) in searchResults" :key="i">
				<view class="goods-name">{{item.goods_name}}</view>
				<uni-icons type="arrowright" size="16"></uni-icons>
			</view>
		</view>
		<!-- 搜索历史 -->
		<view class="history-box" v-else>
			<view class="history-title">
				<text>搜索历史</text>
				<uni-icons type="trash" size="17" @click="cleanHistory"></uni-icons>
			</view>
			<view class="history-list">
				<uni-tag :text="item" v-for="(item,i) in historys" :key="i"
				@click="gotoGoodsList(item)"></uni-tag>
			</view>
		</view>
	</view>
</template>

<script>
	export default {
		data() {
			return {
				timer:null,
				kw:'',
				searchResults:[],
				//搜索历史
				historyList:[]
			};
		},
		computed:{
			historys(){
				//返回新数组
				return [...this.historyList].reverse()
			}
		},
		onLoad(){
			//字符串转化为数组
			this.historyList = JSON.parse(uni.getStorageSync('kw') || '[]')
		},
		methods:{
			// input输入事件的处理函数
			input(e){
				
				clearTimeout(this.timer)
				this.timer = setTimeout(()=>{
					// console.log(e)
					this.kw = e
					this.getSearchList()
				},500)
			},
			async getSearchList(){
				// 判断关键词是否为空
				if(this.kw.length ===0 ){
					this.searchResults = []
					return
				}
				const {data:res} = await uni.$http.get('/api/public/v1/goods/qsearch',{query:this.kw})
				if(res.meta.status !== 200) return uni.$showMsg()
				this.searchResults = res.message
				
				
				this.saveSearchHistory()
			},
			gotoDetail(item){
				console.log(item)
				uni.navigateTo({
					url:"/subpkg/goods_detail/goods_detail?goods_id="+item.goods_id
				})
			},
			saveSearchHistory(){
				// this.historyList.push(this.kw)
				//将Array数组转化为Set对象
				const set = new Set(this.historyList)
				//调用Set对象的delete方法，移除对应的元素
				set.delete(this.kw)
				//调用Set对象的add方法，向Set中添加元素
				set.add(this.kw)
				//将Set对象转化为Array数组
				this.historyList = Array.from(set)
				// 将历史数据存储到本地
				uni.setStorageSync('kw',JSON.stringify(this.historyList))
			},
			cleanHistory(){
				this.historyList = []
				uni.setStorageSync('kw','[]')
			},
			gotoGoodsList(kw){
				uni.navigateTo({
					url:'/subpkg/goods_list/goods_list?query='+kw
				})
			}
		}
	}
</script>

<style lang="scss">
.search-box{
	position: sticky;
	top: 0;
	z-index:999;
}
.sugg-list{
	padding: 0 5px;
	.sugg-item{
		font-size: 12px;
		padding: 13px 0;
		border-bottom: 1px soild #efefef;
		display: flex;
		align-items: center;
		justify-content: space-between;
		.goods-name{
			//不允许换行
			white-space: nowrap;
			//溢出部分隐藏
			overflow: hidden;
		  //文本溢出后，使用...代替
			text-overflow: ellipsis;
			margin-right: 3px;
		}
	}
}
.history-box{
	padding: 0 5px;
	.history-title{
		display: flex;
		justify-content: space-between;
		height: 40px;
		align-items: center;
		font-size: 13px;
		border-bottom: 1px solid #efefef;
	}
	.history-list{
		display: flex;
		flex-wrap: wrap;
		.uni-tag{
			margin-top: 5px;
			margin-right: 5px;
			background-color: #efefef;
			border: none;
			color:#000;
			font-weight: 400;
		}
	}
}
</style>
